November 2017
Beginner
210 pages
4h 41m
English
Content preview from ESP8266 Robotics Projects
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Power supply
The ESP8266 works only with regulated 3.3V. You can build a simple regulated power supply with an LD1117-3.3 linear voltage regulator. It can provide 3.3V at 800 mA. You can purchase a TO-220 package of the LD1117-3.3 for use with a breadboard. Figure 1.5 shows the circuit diagram for 3.3V output. You can supply 4-15V DC to Vin using one of the following sources:
- 7V LiPo battery
- 5V power bank
- 9V battery
- 5V "wall wart" power supply
Figure 1.5: 3.3V regulated power supply circuit diagram
Now, you can connect the power supply to ESP-01:
- Connect Vout to the Vcc pin of ESP-01.
- Connect GND to the GND pin of ESP-01.